I am not very sure about that rule. I have applied but have found that I myself, despite earning merits at a rate of almost double my activity, have sometimes gone a week without receiving a single merit. If he accepts me I will bring it up for discussion. I guess it would be better to change the requirement to get 4 merits in a month
I think this rule is to enforce participants make more and higher quality posts. However, you made a point that a good post does not always receive merit.
More important, many people got merit by exchanging in their local farms or local communities. This rule can be abused by merit exchange to stay in the campaign.
Anyway, think positively about it as it can increase general post quality, I consider it is a good initiative.
otherwise it seems to me that he will be changing people in the campaign frequently, especially if those he takes post mainly in the gambling section, where merits are not usually given.
Only 5 posts are required in Gambling and the rest 20 posts can be non-gambling.